Critical severity9.8NVD Advisory· Published Jan 21, 2026· Updated Apr 15, 2026

CVE-2021-47854

Description

DD-WRT version 45723 contains a buffer overflow vulnerability in the UPNP network discovery service that allows remote attackers to potentially execute arbitrary code. Attackers can send crafted M-SEARCH packets with oversized UUID payloads to trigger buffer overflow conditions on the target device.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Dd Wrt/Dd Wrtllm-fuzzy
Range: =45723

Patches

Vulnerability mechanics

References

dd-wrt.comnvd
download1.dd-wrt.com/dd-wrtv2/downloads/betas/2021/nvd
ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/nvd
www.exploit-db.com/exploits/49730nvd
www.vulncheck.com/advisories/dd-wrt-upnp-buffer-overflownvd

News mentions

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